From: Masami Hiramatsu (Google) <mhira...@kernel.org>
Since traceprobe_parse_event_name() is a bit complicated, add a
kerneldoc for explaining the behavior.
Suggested-by: Steven Rostedt <rost...@goodmis.org>
Signed-off-by: Masami Hiramatsu (Google) <mhira...@kernel.org>
---
Changes in v4:
- Move longer parameter description into Return section.
- Rewrite the style according to
Documentation/doc-guide/kernel-doc.rst
---
kernel/trace/trace_probe.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index 9d26d901c9e5..4fb3d98e38ea 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -247,7 +247,25 @@ int traceprobe_split_symbol_offset(char *symbol, long
*offset)
return 0;
}
-/* @buf must has MAX_EVENT_NAME_LEN size */
+/**
+ * traceprobe_parse_event_name() - Parse a string into group and event names
+ * @pevent: A pointer to the string to be parsed.
+ * @pgroup: A pointer to the group name.
+ * @buf: A buffer to store the parsed group name.
+ * @offset: The offset of the string in the original user command, for logging.
+ *
+ * This parses a string with the format `[GROUP/][EVENT]` or `[GROUP.][EVENT]`
+ * (either GROUP or EVENT or both must be specified).
+ * Since the parsed group name is stored in @buf, the caller must ensure @buf
+ * is at least MAX_EVENT_NAME_LEN bytes.
+ *
+ * Return: 0 on success, or -EINVAL on failure.
+ *
+ * If success, *@pevent is updated to point to the event name part of the
+ * original string, or NULL if there is no event name.
+ * Also, *@pgroup is updated to point to the parsed group which is stored
+ * in @buf, or NULL if there is no group name.
+ */
int traceprobe_parse_event_name(const char **pevent, const char **pgroup,
char *buf, int offset)
{
